Synonyms of hidden

1 Syllable
lost, dark, qt
2 Syllables
shrouded, occult, close, covert, privy, leafier, buried, latent, clouded, rooter, lurking, missed, orphic, cloistral, implied, leafiest, leafy, screened, cloaked, withheld, roofed, veiled, lidded, unknown, cryptic, incog, untold, masked, mystic
3 Syllables
underground, mystifying, mystical, obscured, underlying, obscure, furtive, daedalean, subconscious, cloistered, disguised, shadowy, uncharted, mysterious, hermetic, telestic, little-known, concealed, hermitic, blockaded, ulterior, private, secluded, obscurer, covered, potential, so-and-so, such-and-such, abstruse, unmapped, prepatent, eclipsed, potentials
4 Syllables
unremarked, unemphatic, inconspicuous, undetected, invisible, hermitical, alchemistic, undercover, incognito, undisclosed, clandestine, closelipped, unredeemed, nonrational, hole-and-corner, unconspicuous, esoteric, unhonored, isolated, hermetical, surreptitious, unexposed, camouflaged, undivulged, unobserved, sequestered, unexplained, unperceived, unrevealed, acroamatic, unnoticed, unrecalled, solitary, recondite
5 Syllables
unnoticeable, astrological, enigmatical, unnumberable, imperceivable, indiscernible, unrecognized, unapprehended, unascertained, supernatural, supersensible
6 Syllables
uninformative